The Phasing of Zhalfir is a rare Enchantment — Saga card from Dominaria United (DMU), collector number 59. Current market price: $0.34 (foil $0.36), TCGplayer market prices via Scryfall.
Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.) I, II — Another target nonland permanent phases out. It can't phase in for as long as you control this Saga. III — Destroy all creatures. For each creature destroyed this way, its controller creates a 2/2 black Phyrexian creature token.